The Tokyo Metropolitan Government Building (東京都庁, Tōkyō Tochō) in Shinjuku is often visited by tourists for its free observation decks which provide good panoramic views of Tokyo and beyond. The 243 meter tall building has two towers, and each houses an observatory at a height of 202 meters. It had been the tallest building in Tokyo until it was overtaken by the Midtown Tower in 2007.
With favorable weather conditions, famous landmarks such as Mount Fuji, the Tokyo Skytree, Tokyo Tower, Meiji Shrine and the Tokyo Dome can be seen from the observatories. Each observatory has a cafe and a souvenir shop. The North Observatory remains open later at night, making it a popular spot to catch night views of the city.
It has a big observation deck floor with a cafe and some souvenir shops.
The government office itself doesn't look all too exciting from the outside, but what it has to offer is amazing. There's an elavator reserved just for people trying to get to the observatory floor, and although they have many visitors the floor is so spacious that it never feels crowded. Think I'll be going back many more times!